Porosity Parameters Quantitatively Predicted of Ultra-Low Permeability Reservoir in Hejiaji Area

2015 ◽  
Vol 1092-1093 ◽  
pp. 1440-1443
Author(s):  
Wei Huang ◽  
Xiao Li Zhang ◽  
Xi Zheng ◽  
Gao Run Zhong
Keyword(s):  
Prediction Model ◽  
Effective Porosity ◽  
Quantitative Prediction ◽  
Low Permeability ◽  
Core Analysis ◽  
Response Characteristics ◽  
The Core ◽  
Point Analysis ◽  
Set Up ◽  
Interpretation Model

Using the acoustictime logging data to establish reasonable and effective porosity parameter quantitative prediction model, can predict quality reservoir and favorable petroliferous province. Chang 6 formation in Hejiaji area is taken as an example to studing the reservoir physical properties and logging response characteristics, and the acoustictime logging and core analysis porosity are used to set up porosity logging interpretation model, then acculate porosity according to the model. The results show that after the core place treatment, the porosity quantitative prediction model established by acoustictime and layer point analysis porosity has high precision. To verify the porosity logging interpretation model of the calculated porosity and core analysis porosity, the application effect is good.

scholarly journals Numerical calculation and experimental study on response characteristics of pneumatic solenoid valves

2019 ◽  
Vol 52 (9-10) ◽  
pp. 1382-1393 ◽  
Author(s):  
Xiang Zhang ◽  
Yonghua Lu ◽  
Yang Li ◽  
Chi Zhang ◽  
Rui Wang
Keyword(s):  
Switching Time ◽  
Response Characteristic ◽  
Test System ◽  
Solenoid Valve ◽  
Circuit Model ◽  
Inlet Pressure ◽  
Driving Voltage ◽  
Response Characteristics ◽  
Aerodynamic Model ◽  
Set Up

In order to analyze the response characteristics of the solenoid valve in depth, the flow field of the solenoid valve is analyzed by means of the computational fluid dynamics, and the aerodynamic parameters that are difficult to be obtained by the traditional methods are obtained with software FLUENT. We also set up the mathematical model of the solenoid valve, including the aerodynamic model, the circuit model, the magnetic circuit model and the mechanical motion model. The calculation is completed in the Simulink, and the results of the calculation are analyzed. A set of the solenoid valve response characteristic test system is built, and the response characteristic parameters such as response time and maximum action frequency of the solenoid valve are tested. The experimental results are verified by comparing them with the simulation results. The final result shows that the response characteristics are basically irrelevant to the action frequency at a suitable working frequency. The open switching time of the solenoid valve decreases with the increase in the inlet pressure and the driving voltage and increases with the increase in the number of coil turns. The close switching time increases with the increase in the inlet pressure, the driving voltage and the number of coil turns.

Injectivity and Propagation of Sulfonated Acrylamide-Based Copolymers in Low Permeability Carbonate Reservoir Cores in Harsh Salinity and Temperature Conditions : Challenges and Learnings from a Middle East Onshore Case Study

2021 ◽  
Author(s):  
Nicolas Gaillard ◽  
Matthieu Olivaud ◽  
Alain Zaitoun ◽  
Mahmoud Ould-Metidji ◽  
Guillaume Dupuis ◽  
...  
Keyword(s):  
Middle East ◽  
Polymer Solutions ◽  
Carbonate Reservoir ◽  
Core Material ◽  
Low Permeability ◽  
The Core ◽  
Reservoir Conditions ◽  
Carbonate Cores ◽  
The Impact ◽  
Mobility Reduction

Abstract Polymer flooding is one of the most mature EOR technology applied successfully in a broad range of reservoir conditions. The last developments made in polymer chemistries allowed pushing the boundaries of applicability towards higher temperature and salinity carbonate reservoirs. Specifically designed sulfonated acrylamide-based copolymers (SPAM) have been proven to be stable for more than one year at 120°C and are the best candidates to comply with Middle East carbonate reservoir conditions. Numerous studies have shown good injectivity and propagation properties of SPAM in carbonate cores with permeabilities ranging from 70 to 150 mD in presence of oil. This study aims at providing new insights on the propagation of SPAM in carbonate reservoir cores having permeabilities ranging between 10 and 40 mD. Polymer screening was performed in the conditions of ADNOC onshore carbonate reservoir using a 260 g/L TDS synthetic formation brine together with oil and core material from the reservoir. All the experiments were performed at residual oil saturation (Sor). The experimental approach aimed at reproducing the transport of the polymer entering the reservoir from the sand face up to a certain depth. Three reservoir coreflood experiments were performed in series at increasing temperatures and decreasing rates to mimic the progression of the polymer in the reservoir with a radial velocity profile. A polymer solution at 2000 ppm was injected in the first core at 100 mL/h and 40°C. Effluents were collected and injected in the second core at 20 mL/h and 70°C. Effluents were collected again and injected in the third core at 4 mL/h and 120°C. A further innovative approach using reservoir minicores (6 mm length disks) was also implemented to screen the impact of different parameters such as Sor, molecular weight and prefiltration step on the injectivity of the polymer solutions. According to minicores data, shearing of the polymer should help to ensure good propagation and avoid pressure build-up at the core inlet. This result was confirmed through an injection in a larger core at Sor and at 120°C. When comparing the injection of sheared and unsheared polymer at the same concentration, core inlet impairment was suppressed with the sheared polymer and the same range of mobility reduction (Rm) was achieved in the internal section of the core although viscosity was lower for the sheared polymer. Such result indicates that shearing is an efficient way to improve injectivity while maximizing the mobility reduction by suppressing the loss of product by filtration/retention at the core inlet. This paper gives new insights concerning SPAM rheology in low permeability carbonate cores. Additionally, it provides an innovative and easier approach for screening polymer solutions to anticipate their propagation in more advanced coreflooding experiments.

Research on Multimedia Sports Humanistic Information Systems

2014 ◽  
Vol 926-930 ◽  
pp. 2706-2709
Author(s):  
Ming Wen Hu
Keyword(s):  
Information System ◽  
Information Systems ◽  
Program Implementation ◽  
Social Life ◽  
Technology Development ◽  
Rapid Development ◽  
Development Environment ◽  
Sports Culture ◽  
The Core ◽  
Set Up

With the rapid development of social productive forces and increasingly higher level of social life, the sports humanity as the core spirit of sports culture in informational times, which is the sum of the psychological aspects of sports culture from the cultural spirit. Its essence is the pursuit of truth, good and beautiful as the core values and ideals, people's healthy development as the ultimate goal. This paper discusses basic mode ,the basic framework of the multimedia sports humanistic information system, the processing technology, development environment ,tools and methods . Through the analysis program implementation elements and design ideas of multimedia sports humanistic information system, in order to set up multimedia sports humanistic information systems, we proposes a viable framework and models with a theoretical basis and practical value.

Design Model and Prediction Model on Preparation of Functionally Graded Material by Co-Sedimentation

2005 ◽  
Vol 492-493 ◽  
pp. 471-476 ◽  
Author(s):  
Zhi Guang Zhou ◽  
Lian Meng Zhang ◽  
Qiang Shen ◽  
Dao Ren Gong
Keyword(s):  
Prediction Model ◽  
Volume Fraction ◽  
Functionally Graded ◽  
Design Model ◽  
Design Experiment ◽  
Mathematical Relationship ◽  
Graded Material ◽  
Powder Properties ◽  
Set Up ◽  
The Relationship

From the process of sedimentation the mathematical relationship between deposition volume and powder properties as well as sedimentation parameters was deduced in this paper. The relationship was expressed by using indirect method. Based on the formula, design model and prediction model were set up. The models can be used to design powder properties and predict the volume fraction of FGM. Programs to solve the models were developed in numerical methods. As examples, TiC-Ni system FGM were designed and predicted. The prediction results fit well with the design. Experiment of Mo-Ti system FGM was used to validate the prediction model.

scholarly journals SURAT DAKWAH NABI MUHAMMAD SAW (ANALISIS TEMATIK ATAS SURAT-SURAT NABI MUHAMMAD KEPADA PARA RAJA)

1970 ◽  
Vol 13 (1) ◽  
pp. 28-46 ◽  
Author(s):  
Ubaidillah Ubaidillah
Keyword(s):  
Thematic Analysis ◽  
Basic Theory ◽  
Core Analysis ◽  
Major Theme ◽  
Son Of God ◽  
The Core ◽  
Present Context ◽  
Unity Of God ◽  
Bahasa Indonesia ◽  
Name Of God

This paper aims to find the themes of propagation of Islam Prophet Muhammad in the early spread of Islam that can be used uswah h}asanah by preachers in Indonesia in spreading Islam in accordance with the present context. Letters were used as the data in this study are the letters sent by the Prophet Muhammad to the king superpower in the Roman and Persian kings and their little under the authority of the king of the superpower. The letters are including in these types of letter are ten letters. Stanton thematic theory which states that the theme (theme) is contained in the meaning of a story, become the basic theory in this study. In addition, there is also a theme in the study of the distribution of known theme with theme of major and minor themes. In analyzing the data, before entering the core analysis, the author uses the method of analysis and match with sub-method translational match. In this case, the letters of the Prophet Muhammad first translated into Indonesian, after it analyzed according issues to be answered. The findings of this thematic analysis form the major theme of “propagation of Islam” whose content is tailored to the circumstances of the king recipients. Of the major themes, there are minor themes are used to support the universality of the major themes of these letters, they are: dakwah must be by the name of God, pray forsalvation only to Muslims, Jesus is not the son of God, all the religions of Semitic is unity of God (tawhid), religion God recognized only Islam, and Islam is tolerant religion. Tulisan ini bertujuan untuk mencari tema-tema dakwah Islam Nabi Muhammad pada awal penyebaran Islam yang dapat dijadikan uswah h}asanah oleh para da’i di Indonesia dalam menyebarkan agama Islam yang sesuai dengan konteks kekinian. Surat yang dijadikan data pada penelitian ini adalah surat-surat yang dikirim oleh Nabi Muhammad kepada para raja adidaya di Romawi dan Persi beserta raja-raja kecil yang berada di bawah kekuasaan kedua raja adidaya tersebut. Yang temasuk dalam jenis surat ini sejumlah sepuluh pucuk surat. Teori tematik Stanton dan Kenny yang menyatakan bahwa tema (theme) adalah makna yang dikandung sebuah cerita, menjadi landasan teori dalam penelitian ini. Selain itu, terdapat pula pembagian tema yang dalam kajian tema dikenal dengan tema mayor dan tema minor. Dalam menganalisis data, sebelum masuk pada analisis inti, penulis menggunakan metode analisis padan dengan submetode padan translasional. Dalam hal ini, surat-surat Nabi Muhammad tersebut diterjemahkan terlebih dahulu ke dalam bahasa Indonesia, setelah itu dianalisis sesuai permasalahan yang ingin dijawab. Temuan dari analisis tematik ini berupa tema mayor tentang “dakwah Islam” yang isinya disesuaikan dengan keadaan para raja penerima surat. Dari tema mayor tersebut, terdapat tema-tema minor yang digunakan untuk mendukung keuniversalan tema mayor surat-surat tersebut, yaitu berdakwah harus karena Allah, mendoakan keselamatan hanya untuk muslim, Nabi Isa bukananak Tuhan, seluruh ajaran agama semitik adalah pengesaan Allah, agama yang diakui Allah hanya Islam, dan Islam agama yang toleran.

scholarly journals Machine Learning and Artificial Intelligence in Online Fake Transaction Alerting

2015 ◽  
Vol 3 (2) ◽  
pp. 115-126 ◽  
Author(s):  
Naresh Babu Bynagari
Keyword(s):  
Artificial Intelligence ◽  
Machine Learning ◽  
Fraud Detection ◽  
Learning Ability ◽  
The Core ◽  
The Past ◽  
Music Selection ◽  
Intelligent Analysis ◽  
Set Up ◽  
Detection Mechanisms

Artificial Intelligence (AI) is one of the most promising and intriguing innovations of modernity. Its potential is virtually unlimited, from smart music selection in personal gadgets to intelligent analysis of big data and real-time fraud detection and aversion. At the core of the AI philosophy lies an assumption that once a computer system is provided with enough data, it can learn based on that input. The more data is provided, the more sophisticated its learning ability becomes. This feature has acquired the name "machine learning" (ML). The opportunities explored with ML are plentiful today, and one of them is an ability to set up an evolving security system learning from the past cyber-fraud experiences and developing more rigorous fraud detection mechanisms. Read on to learn more about ML, the types and magnitude of fraud evidenced in modern banking, e-commerce, and healthcare, and how ML has become an innovative, timely, and efficient fraud prevention technology.

Research on Method of Metro Monitoring Model Based on Grey Prediction Algorithm

2014 ◽  
Vol 548-549 ◽  
pp. 641-645
Author(s):  
Mao Hua Liu ◽  
Xiu Bo Sun
Keyword(s):  
Prediction Model ◽  
Safety Monitoring ◽  
Prediction Algorithm ◽  
Grey Prediction ◽  
Monitoring Point ◽  
Value Analysis ◽  
Grey Prediction Model ◽  
Monitoring Model ◽  
Surface Monitoring ◽  
Set Up

Grey prediction model is a model to predict the trend maturely, its application in the subway safety monitoring is of great significance. Set up by MATLAB software to complete the grey prediction model, and take the surface monitoring point for example, Comparing the prediction value with the actual measured value, analysis by the accuracy, obtain the trend of surface change around the subway station.

Competition Between Neobanks and Online Banks in the French Retail Banking Market and Reactions From Universal Banks

2021 ◽  
pp. 191-216
Author(s):  
Jean Michel Rocchi
Keyword(s):  
Survival Analysis ◽  
Population Ecology ◽  
Banking System ◽  
Retail Banking ◽  
The Other ◽  
The Core ◽  
Banking Market ◽  
Set Up ◽  
Retail Banks ◽  
Market Strategies

This chapter will provide an analysis of market moves, and innovation sources, from newcomers and incumbent players, based on core and periphery networks theory; and additional survival analysis and VSR model, based on organizational population ecology. The French market neobanks, which are a subpart of fintech, are dominantly set up by entrepreneurs. On the contrary, online banks usually have universal banks as shareholders. Does this difference matter regarding market strategies? Is innovation coming only from peripheral actors like online banks and moreover neobanks, or do large retail banks at the heart of the banking system try to integrate or promote it? The author will discuss these topics to conclude with mixed evidence. Hence, if neobanks, on one hand, tend to converge towards the core; universal banks, on the other hand, are growingly accepting peripheral actors.

Introduction

2019 ◽  
pp. 1-8
Author(s):  
Liesbet Hooghe ◽  
Tobias Lenz ◽  
Gary Marks
Keyword(s):  
Decision Making ◽  
Public Goods ◽  
Collective Decision ◽  
International Organization ◽  
International Governance ◽  
Collective Decision Making ◽  
The Core ◽  
Set Up

Chapter 1 sets out the core puzzle of international governance, introduces postfunctionalist theory, and situates it in relation to realism, liberal institutionalism, and constructivism. Postfunctionalism theorizes how conceptions of community constrain the functional provision of public goods across territorial scale. It hypothesizes that international organization is social as well as functional and provides a precise and falsifiable explanation of the institutional set-up of an IO, including its membership, contractual basis, policy portfolio, and the extent to which an IO pools authority in collective decision making and delegates authority to independent actors.

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